ABB G3FK HENF452878R1｜DCS System Card｜

 

1. 16 channel isolated digital switch acquisition (core)
16 channel optoelectronic isolation 24VDC digital input DI board, collecting all passive switch and auxiliary contact signals inside and outside the excitation cabinet:
Circuit breaker opening/closing position, knife switch position, and cooling fan operating status
Excitation system local/remote mode, manual/automatic mode switch
External protection interlock, emergency stop, and unit shutdown status contacts
Each channel has independent photoelectric isolation (1500VAC withstand voltage) to isolate strong electromagnetic interference from power plant frequency converters and high-voltage switches, preventing false acquisition and signal jumping.2. Preprocessing of switch signal and anti shake filtering
Onboard hardware RC anti shake circuit, filtering out on-site contact jitter and line clutter interference; Standardize the discrete switch signals and upload them to the E3ES digital master control through the backplane bus for real-time monitoring and logical interlocking judgment by the DCS upper level.

3. Channel fault self-test and status indication
The panel is equipped with multiple LED indicator lights, which can directly light up alarms for single channel disconnection, short circuit, and power abnormality; The fault signal is synchronously uploaded to E3ES, and the central control pop-up window indicates point faults, quickly troubleshooting wiring and switch damage issues.

4. Redundant system adaptation and hot swappable maintenance
Supports dual G3FK redundant configuration, with one primary and one backup acquisition, ensuring that switch signals are not lost in the event of a single board failure; The replacement of the cabinet with live plugging does not require shutting down the entire generator excitation system and does not affect the power generation of the unit.

ABB G3FK HENF452878R1｜DCS System Card｜